GOB: Add constants for different surfaces/sprites

Add
static const int kFrontSurface   = 20;
static const int kBackSurface    = 21;
static const int kAnimSurface    = 22;
static const int kCursorSurface  = 23;
static const int kCaptureSurface = 30;
to class Draw and substitute the raw numbers in other files with
those aliases, for readability.

svn-id: r51852

1 files changed, 6 insertions, 6 deletions

diff --git a/engines/gob/draw_fascin.cpp b/engines/gob/draw_fascin.cpp
index 9d30faa972..1e01db7dfb 100644
--- a/engines/gob/draw_fascin.cpp
+++ b/engines/gob/draw_fascin.cpp
@@ -53,12 +53,12 @@ void Draw_Fascination::spriteOperation(int16 operation) {
 		_destSurface -= 80;
 
 	if ((_renderFlags & RENDERFLAG_USEDELTAS) && !deltaVeto) {
-		if ((_sourceSurface == 21) && (operation != DRAW_LOADSPRITE)) {
+		if ((_sourceSurface == kBackSurface) && (operation != DRAW_LOADSPRITE)) {
 			_spriteLeft += _backDeltaX;
 			_spriteTop += _backDeltaY;
 		}
 
-		if (_destSurface == 21) {
+		if (_destSurface == kBackSurface) {
 			_destSpriteX += _backDeltaX;
 			_destSpriteY += _backDeltaY;
 			if ((operation == DRAW_DRAWLINE) ||
@@ -70,7 +70,7 @@ void Draw_Fascination::spriteOperation(int16 operation) {
 	}
 
 	if (_renderFlags & 0x20) {
-		if (_destSurface == 21 || (operation == 0 && _sourceSurface == 21)) {
+		if (_destSurface == kBackSurface || (operation == 0 && _sourceSurface == kBackSurface)) {
 			winDraw(operation);
 			return;
 		}
@@ -86,7 +86,7 @@ void Draw_Fascination::spriteOperation(int16 operation) {
 	int16 destSurface = _destSurface;
 	int16 sourceSurface = _sourceSurface;
 
-	if (_vm->_video->_splitSurf && ((_destSurface == 20) || (_destSurface == 21))) {
+	if (_vm->_video->_splitSurf && ((_destSurface == kFrontSurface) || (_destSurface == kBackSurface))) {
 		if ((_destSpriteY >= _vm->_video->_splitStart)) {
 			_destSpriteY -= _vm->_video->_splitStart;
 			if ((operation == DRAW_DRAWLINE) ||
@@ -340,12 +340,12 @@ void Draw_Fascination::spriteOperation(int16 operation) {
 	}
 
 	if ((_renderFlags & RENDERFLAG_USEDELTAS) && !deltaVeto) {
-		if (_sourceSurface == 21) {
+		if (_sourceSurface == kBackSurface) {
 			_spriteLeft -= _backDeltaX;
 			_spriteTop -= _backDeltaY;
 		}
 
-		if (_destSurface == 21) {
+		if (_destSurface == kBackSurface) {
 			_destSpriteX -= _backDeltaX;
 			_destSpriteY -= _backDeltaY;
 		}